[OmniOS-discuss] Samba Performance

[Doug Hughes]

The equivalent TCP raw tunings for Solaris based OS's

ndd -set /dev/tcp tcp_xmit_hiwat 1048576
ndd -set /dev/tcp tcp_recv_hiwat 1048576
ndd -set /dev/tcp tcp_max_buf 4194304

Those are the raw tunables and if you run get on those you'll see that they
are different than what's in ipadm. One is just buffers, but these are the
sliding window parameters.

How big is your latency? Agreed that 1Mb seems like plenty even for
east/west coast high-bandwidth WAN. You certainly wouldn't need to go about
4MB for that.


On Tue, May 19, 2015 at 1:49 PM, Dan McDonald <danmcd at omniti.com> wrote:

>
> > On May 19, 2015, at 1:36 PM, Michael Talbott <mtalbott at lji.org> wrote:
> >
> > And then in Omni, I've set these ip properties
> > root at store3:# ipadm show-prop
> > PROTO PROPERTY              PERM CURRENT      PERSISTENT   DEFAULT
> POSSIBLE
> > tcp   max_buf               rw   16777216     16777216     1048576
> 8192-1073741824
> > tcp   recv_buf              rw   16777216     16777216     128000
>  2048-16777216
> > tcp   send_buf              rw   16777216     16777216     49152
> 4096-16777216
> >
> > I just can't get samba on Omni to go any faster than 60MB/s. I've tried
> adjusting those buffers, removing the socket options in smb.conf
> altogether, but, to no avail.
>
> I'd lower recv/send from 16MB down to 1MB unless you have a VERY HIGH
> DELAY network.  You just aren't buying much beyond 1MB.
>
> I've heard Samba itself is the source of most of these problems.
>
> As for the built-in smb sharing... there are improvements already starting
> to be upstreamed in illumos-gate (and are in the OmniOS bloody release),
> but it may not solve all of your problems that Samba will solve.  I'd
> suggest asking the illumos list your SMB questions as well -- maybe one of
> the Nexentians will be able to point the way toward what's coming.
>
> Dan
>
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